3. (a) On a sheet of graph paper, using a scale of
1 cm to represent 1 unit on the x-axis and
1 cm to represent 2 units on the y-axis,
draw the graph of each of the following
functions for values of x from 4 to 4.
(i) y = –2x + 5 (ii) y = -2x + 3
(iii) y = -2x – 4 (iv) y = –2x – 7
(b) What do you notice about the lines you
have drawn in (a)?
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